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1-13mm in 0.5mm increments HSS Cobolt Fully ground twist drill bit set in a metal case.
Consisting of: 25 twist drills DIN 338 type N HSS Cobolt ground. Ø 1,0 mm up to 13mm in increments of 0,5 mm - High performance Cobolt ground twist drill.
The fully ground Cobolt twist drill has a more precise concentricity.